A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following reports on North Africa: the Hermann Goering Division, probably in the Medjez El Bab sector, reports penetration by Allied tanks, on April 22; and the Tunis Air Corps' aircraft return for April 22, describing 114 aircraft as serviceable; on Greece: of 3 successful sabotage operations on Greek railways, on April 13-16, and German and Italian casualties; and on Germany/France: giving details of Allied air raids on Stettin and Cherbourg during April 20, sent to the German air attaché in Bucharest on April 21.